@Helenluvsrob
I would ask if there are make only rape survivors groups ,
Yes, of course there are.
Do you also want to know who sets them up, who finds funding for them? Who ensures they get staffed, supported and continue to run?
Women who set up the female services.
Men start them off, may staff them, be the public face of them etc, But women like me do the funding work, the nitty gritty either directly or because we are asked to give our time and expertise as support in setting them up... and then we never bloody leave!
Not all of them obviously. But of the 4 I am directly aware of... I have supported 3 of them as far as funding and policy remits go. The organisation I work for supports 2 of them, financially and with training, and all of them have, or had, a woman from one of the womens services as board member for years.
Many men set up similar services. But there just aren't as many men willing to continue them in the long term, or come forward to use them. There are many studies into this and a lot of support waiting for when the need is clarified. far more good will than I have seen for expanding, or even maintaining, single sex female services.
To steal a thought - google it 
Survivors UK
National Male Survivors Helpline
Lost of local county level sevcies
Mankind and Men's Advice Line
Male - Rape Org
The government's Male Rape Support Fund kick started a lot of services.
And it is a very different kind of service to that for women.